//
// "Id"
//
// GLUT emulation header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2007 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

// Emulation of GLUT using fltk.

// GLUT is Copyright (c) Mark J. Kilgard, 1994, 1995, 1996:
// "This program is freely distributable without licensing fees  and is
// provided without guarantee or warrantee expressed or  implied. This
// program is -not- in the public domain."

// Although I have copied the GLUT API, none of my code is based on
// any GLUT implementation details and is therefore covered by the LGPL.

// Commented out lines indicate parts of GLUT that are not emulated.

#ifndef Fl_glut_H
#  define Fl_glut_H

#  include "gl.h"

////////////////////////////////////////////////////////////////
// GLUT is emulated using this window class and these static variables
// (plus several more static variables hidden in glut_compatability.cxx):

#  include "Fl.H"
#  include "Fl_Gl_Window.H"

class FL_EXPORT Fl_Glut_Window : public Fl_Gl_Window {
  void _init();
  int mouse_down;
protected:
  void draw();
  void draw_overlay();
  int handle(int);
public: // so the inline functions work
  int number;
  int menu[3];
  void make_current();
  void (*display)();
  void (*overlaydisplay)();
  void (*reshape)(int w, int h);
  void (*keyboard)(uchar, int x, int y);
  void (*mouse)(int b, int state, int x, int y);
  void (*motion)(int x, int y);
  void (*passivemotion)(int x, int y);
  void (*entry)(int);
  void (*visibility)(int);
  void (*special)(int, int x, int y);
  Fl_Glut_Window(int w, int h, const char *);
  Fl_Glut_Window(int x, int y, int w, int h, const char *);
  ~Fl_Glut_Window();
};

extern FL_EXPORT Fl_Glut_Window *glut_window;  // the current window
extern FL_EXPORT int glut_menu;      // the current menu

// function pointers that are not per-window:
extern FL_EXPORT void (*glut_idle_function)();
extern FL_EXPORT void (*glut_menustate_function)(int);
extern FL_EXPORT void (*glut_menustatus_function)(int,int,int);

////////////////////////////////////////////////////////////////

//#  define GLUT_API_VERSION This does not match any version of GLUT exactly...

FL_EXPORT void glutInit(int *argcp, char **argv); // creates first window

FL_EXPORT void glutInitDisplayMode(unsigned int mode);
// the FL_ symbols have the same value as the GLUT ones:
#  define GLUT_RGB  FL_RGB
#  define GLUT_RGBA  FL_RGB
#  define GLUT_INDEX  FL_INDEX
#  define GLUT_SINGLE  FL_SINGLE
#  define GLUT_DOUBLE  FL_DOUBLE
#  define GLUT_ACCUM  FL_ACCUM
#  define GLUT_ALPHA  FL_ALPHA
#  define GLUT_DEPTH  FL_DEPTH
#  define GLUT_STENCIL  FL_STENCIL
#  define GLUT_MULTISAMPLE FL_MULTISAMPLE
#  define GLUT_STEREO  FL_STEREO
// #  define GLUT_LUMINANCE    512

FL_EXPORT void glutInitWindowPosition(int x, int y);

FL_EXPORT void glutInitWindowSize(int w, int h);

FL_EXPORT void glutMainLoop();

FL_EXPORT int glutCreateWindow(char *title);
FL_EXPORT int glutCreateWindow(const char *title);

FL_EXPORT int glutCreateSubWindow(int win, int x, int y, int width, int height);

FL_EXPORT void glutDestroyWindow(int win);

inline void glutPostRedisplay() {glut_window->redraw();}

FL_EXPORT void glutPostWindowRedisplay(int win);

FL_EXPORT void glutSwapBuffers();

inline int glutGetWindow() {return glut_window->number;}

FL_EXPORT void glutSetWindow(int win);

inline void glutSetWindowTitle(char *t) {glut_window->label(t);}

inline void glutSetIconTitle(char *t) {glut_window->iconlabel(t);}

inline void glutPositionWindow(int x, int y) {glut_window->position(x,y);}

inline void glutReshapeWindow(int w, int h) {glut_window->size(w,h);}

inline void glutPopWindow() {glut_window->show();}

inline void glutPushWindow() { /* do nothing */ }

inline void glutIconifyWindow() {glut_window->iconize();}

inline void glutShowWindow() {glut_window->show();}

inline void glutHideWindow() {glut_window->hide();}

inline void glutFullScreen() {glut_window->fullscreen();}

inline void glutSetCursor(Fl_Cursor cursor) {glut_window->cursor(cursor);}
// notice that the numeric values are different than glut:
#  define GLUT_CURSOR_RIGHT_ARROW    ((Fl_Cursor)2)
#  define GLUT_CURSOR_LEFT_ARROW    ((Fl_Cursor)67)
#  define GLUT_CURSOR_INFO      FL_CURSOR_HAND
#  define GLUT_CURSOR_DESTROY      ((Fl_Cursor)45)
#  define GLUT_CURSOR_HELP      FL_CURSOR_HELP
#  define GLUT_CURSOR_CYCLE      ((Fl_Cursor)26)
#  define GLUT_CURSOR_SPRAY      ((Fl_Cursor)63)
#  define GLUT_CURSOR_WAIT      FL_CURSOR_WAIT
#  define GLUT_CURSOR_TEXT      FL_CURSOR_INSERT
#  define GLUT_CURSOR_CROSSHAIR      FL_CURSOR_CROSS
#  define GLUT_CURSOR_UP_DOWN      FL_CURSOR_NS
#  define GLUT_CURSOR_LEFT_RIGHT    FL_CURSOR_WE
#  define GLUT_CURSOR_TOP_SIDE      FL_CURSOR_N
#  define GLUT_CURSOR_BOTTOM_SIDE    FL_CURSOR_S
#  define GLUT_CURSOR_LEFT_SIDE      FL_CURSOR_W
#  define GLUT_CURSOR_RIGHT_SIDE    FL_CURSOR_E
#  define GLUT_CURSOR_TOP_LEFT_CORNER    FL_CURSOR_NW
#  define GLUT_CURSOR_TOP_RIGHT_CORNER    FL_CURSOR_NE
#  define GLUT_CURSOR_BOTTOM_RIGHT_CORNER  FL_CURSOR_SE
#  define GLUT_CURSOR_BOTTOM_LEFT_CORNER  FL_CURSOR_SW
#  define GLUT_CURSOR_INHERIT      FL_CURSOR_DEFAULT
#  define GLUT_CURSOR_NONE      FL_CURSOR_NONE
#  define GLUT_CURSOR_FULL_CROSSHAIR    FL_CURSOR_CROSS

inline void glutWarpPointer(int, int) { /* do nothing */ }

inline void glutEstablishOverlay() {glut_window->make_overlay_current();}

inline void glutRemoveOverlay() {glut_window->hide_overlay();}

inline void glutUseLayer(GLenum layer) {
  layer ? glut_window->make_overlay_current() : glut_window->make_current();}
enum {GLUT_NORMAL, GLUT_OVERLAY};

inline void glutPostOverlayRedisplay() {glut_window->redraw_overlay();}

inline void glutShowOverlay() {glut_window->redraw_overlay();}

inline void glutHideOverlay() {glut_window->hide_overlay();}

FL_EXPORT int glutCreateMenu(void (*)(int));

FL_EXPORT void glutDestroyMenu(int menu);

inline int glutGetMenu() {return glut_menu;}

inline void glutSetMenu(int m) {glut_menu = m;}

FL_EXPORT void glutAddMenuEntry(char *label, int value);

FL_EXPORT void glutAddSubMenu(char *label, int submenu);

FL_EXPORT void glutChangeToMenuEntry(int item, char *labela, int value);

FL_EXPORT void glutChangeToSubMenu(int item, char *label, int submenu);

FL_EXPORT void glutRemoveMenuItem(int item);

inline void glutAttachMenu(int b) {glut_window->menu[b] = glut_menu;}

inline void glutDetachMenu(int b) {glut_window->menu[b] = 0;}

inline void glutDisplayFunc(void (*f)()) {glut_window->display = f;}

inline void glutReshapeFunc(void (*f)(int w, int h)) {glut_window->reshape=f;}

inline void glutKeyboardFunc(void (*f)(uchar key, int x, int y)) {
  glut_window->keyboard = f;}

inline void glutMouseFunc(void (*f)(int b, int state, int x, int y)) {
  glut_window->mouse = f;}
#  define GLUT_LEFT_BUTTON    0
#  define GLUT_MIDDLE_BUTTON    1
#  define GLUT_RIGHT_BUTTON    2
#  define GLUT_DOWN      0
#  define GLUT_UP      1

inline void glutMotionFunc(void (*f)(int x, int y)) {glut_window->motion= f;}

inline void glutPassiveMotionFunc(void (*f)(int x, int y)) {
  glut_window->passivemotion= f;}

inline void glutEntryFunc(void (*f)(int s)) {glut_window->entry = f;}
enum {GLUT_LEFT, GLUT_ENTERED};

inline void glutVisibilityFunc(void (*f)(int s)) {glut_window->visibility=f;}
enum {GLUT_NOT_VISIBLE, GLUT_VISIBLE};

inline void glutIdleFunc(void (*f)()) {Fl::set_idle(f);}

// Warning: this cast may not work on all machines:
inline void glutTimerFunc(unsigned int msec, void (*f)(int), int value) {
  Fl::add_timeout(msec*.001, (void (*)(void *))f, (void *)value);
}

inline void glutMenuStateFunc(void (*f)(int state)) {
  glut_menustate_function = f;}

inline void glutMenuStatusFunc(void (*f)(int status, int x, int y)) {
  glut_menustatus_function = f;}
enum {GLUT_MENU_NOT_IN_USE, GLUT_MENU_IN_USE};

inline void glutSpecialFunc(void (*f)(int key, int x, int y)) {
  glut_window->special = f;}
#  define GLUT_KEY_F1      1
#  define GLUT_KEY_F2      2
#  define GLUT_KEY_F3      3
#  define GLUT_KEY_F4      4
#  define GLUT_KEY_F5      5
#  define GLUT_KEY_F6      6
#  define GLUT_KEY_F7      7
#  define GLUT_KEY_F8      8
#  define GLUT_KEY_F9      9
#  define GLUT_KEY_F10      10
#  define GLUT_KEY_F11      11
#  define GLUT_KEY_F12      12
// WARNING: Different values than GLUT uses:
#  define GLUT_KEY_LEFT      FL_Left
#  define GLUT_KEY_UP      FL_Up
#  define GLUT_KEY_RIGHT    FL_Right
#  define GLUT_KEY_DOWN      FL_Down
#  define GLUT_KEY_PAGE_UP    FL_Page_Up
#  define GLUT_KEY_PAGE_DOWN    FL_Page_Down
#  define GLUT_KEY_HOME      FL_Home
#  define GLUT_KEY_END      FL_End
#  define GLUT_KEY_INSERT    FL_Insert

//inline void glutSpaceballMotionFunc(void (*)(int x, int y, int z));

//inline void glutSpaceballRotateFunc(void (*)(int x, int y, int z));

//inline void glutSpaceballButtonFunc(void (*)(int button, int state));

//inline void glutButtonBoxFunc(void (*)(int button, int state));

//inline void glutDialsFunc(void (*)(int dial, int value));

//inline void glutTabletMotionFunc(void (*)(int x, int y));

//inline void glutTabletButtonFunc(void (*)(int button, int state, int x, int y));

inline void glutOverlayDisplayFunc(void (*f)()) {
  glut_window->overlaydisplay = f;}

//inline void glutWindowStatusFunc(void (*)(int state));
//enum {GLUT_HIDDEN, GLUT_FULLY_RETAINED, GLUT_PARTIALLY_RETAINED,
//  GLUT_FULLY_COVERED};

//inline void glutSetColor(int, GLfloat red, GLfloat green, GLfloat blue);

//inline GLfloat glutGetColor(int ndx, int component);
//#define GLUT_RED      0
//#define GLUT_GREEN      1
//#define GLUT_BLUE      2

//inline void glutCopyColormap(int win);

// Warning: values are changed from GLUT!
// Also relies on the GL_ symbols having values greater than 100
FL_EXPORT int glutGet(GLenum type);
enum {
  GLUT_RETURN_ZERO = 0,
  GLUT_WINDOW_X,
  GLUT_WINDOW_Y,
  GLUT_WINDOW_WIDTH,
  GLUT_WINDOW_HEIGHT,
  GLUT_WINDOW_PARENT,
  GLUT_SCREEN_WIDTH,
  GLUT_SCREEN_HEIGHT,
  GLUT_MENU_NUM_ITEMS,
  GLUT_DISPLAY_MODE_POSSIBLE,
  GLUT_INIT_WINDOW_X,
  GLUT_INIT_WINDOW_Y,
  GLUT_INIT_WINDOW_WIDTH,
  GLUT_INIT_WINDOW_HEIGHT,
  GLUT_INIT_DISPLAY_MODE,
  GLUT_WINDOW_BUFFER_SIZE,
  GLUT_VERSION
//GLUT_WINDOW_NUM_CHILDREN,
//GLUT_WINDOW_CURSOR,
//GLUT_SCREEN_WIDTH_MM,
//GLUT_SCREEN_HEIGHT_MM,
//GLUT_ELAPSED_TIME,
};

#  define GLUT_WINDOW_STENCIL_SIZE  GL_STENCIL_BITS
#  define GLUT_WINDOW_DEPTH_SIZE  GL_DEPTH_BITS
#  define GLUT_WINDOW_RED_SIZE    GL_RED_BITS
#  define GLUT_WINDOW_GREEN_SIZE  GL_GREEN_BITS
#  define GLUT_WINDOW_BLUE_SIZE    GL_BLUE_BITS
#  define GLUT_WINDOW_ALPHA_SIZE  GL_ALPHA_BITS
#  define GLUT_WINDOW_ACCUM_RED_SIZE  GL_ACCUM_RED_BITS
#  define GLUT_WINDOW_ACCUM_GREEN_SIZE  GL_ACCUM_GREEN_BITS
#  define GLUT_WINDOW_ACCUM_BLUE_SIZE  GL_ACCUM_BLUE_BITS
#  define GLUT_WINDOW_ACCUM_ALPHA_SIZE  GL_ACCUM_ALPHA_BITS
#  define GLUT_WINDOW_DOUBLEBUFFER  GL_DOUBLEBUFFER
#  define GLUT_WINDOW_RGBA    GL_RGBA
#  define GLUT_WINDOW_COLORMAP_SIZE  GL_INDEX_BITS
#  ifdef GL_SAMPLES_SGIS
#    define GLUT_WINDOW_NUM_SAMPLES  GL_SAMPLES_SGIS
#  else
#    define GLUT_WINDOW_NUM_SAMPLES  GLUT_RETURN_ZERO
#  endif
#  define GLUT_WINDOW_STEREO    GL_STEREO

#  define GLUT_HAS_KEYBOARD    600
#  define GLUT_HAS_MOUSE    601
#  define GLUT_HAS_SPACEBALL    602
#  define GLUT_HAS_DIAL_AND_BUTTON_BOX  603
#  define GLUT_HAS_TABLET    604
#  define GLUT_NUM_MOUSE_BUTTONS  605
#  define GLUT_NUM_SPACEBALL_BUTTONS  606
#  define GLUT_NUM_BUTTON_BOX_BUTTONS  607
#  define GLUT_NUM_DIALS    608
#  define GLUT_NUM_TABLET_BUTTONS  609
FL_EXPORT int glutDeviceGet(GLenum type);

// WARNING: these values are different than GLUT uses:
#  define GLUT_ACTIVE_SHIFT               FL_SHIFT
#  define GLUT_ACTIVE_CTRL                FL_CTRL
#  define GLUT_ACTIVE_ALT                 FL_ALT
inline int glutGetModifiers() {return Fl::event_state() & (GLUT_ACTIVE_SHIFT | GLUT_ACTIVE_CTRL | GLUT_ACTIVE_ALT);}

FL_EXPORT int glutLayerGet(GLenum);
#  define GLUT_OVERLAY_POSSIBLE    800
//#define GLUT_LAYER_IN_USE    801
//#define GLUT_HAS_OVERLAY    802
#  define GLUT_TRANSPARENT_INDEX    803
#  define GLUT_NORMAL_DAMAGED    804
#  define GLUT_OVERLAY_DAMAGED    805

extern "C" {
typedef void (*GLUTproc)();
}

FL_EXPORT GLUTproc glutGetProcAddress(const char *procName);

//inline int glutVideoResizeGet(GLenum param);
//#define GLUT_VIDEO_RESIZE_POSSIBLE  900
//#define GLUT_VIDEO_RESIZE_IN_USE  901
//#define GLUT_VIDEO_RESIZE_X_DELTA  902
//#define GLUT_VIDEO_RESIZE_Y_DELTA  903
//#define GLUT_VIDEO_RESIZE_WIDTH_DELTA  904
//#define GLUT_VIDEO_RESIZE_HEIGHT_DELTA 905
//#define GLUT_VIDEO_RESIZE_X    906
//#define GLUT_VIDEO_RESIZE_Y    907
//#define GLUT_VIDEO_RESIZE_WIDTH  908
//#define GLUT_VIDEO_RESIZE_HEIGHT  909

//inline void glutSetupVideoResizing();

//inline void glutStopVideoResizing();

//inline void glutVideoResize(int x, int y, int width, int height);

//inline void glutVideoPan(int x, int y, int width, int height);

// Font argument must be a void* for compatability, so...
extern FL_EXPORT struct Fl_Glut_Bitmap_Font {uchar font; int size;}
  glutBitmap9By15, glutBitmap8By13, glutBitmapTimesRoman10,
  glutBitmapTimesRoman24, glutBitmapHelvetica10, glutBitmapHelvetica12,
  glutBitmapHelvetica18;
#  define GLUT_BITMAP_9_BY_15             (&glutBitmap9By15)
#  define GLUT_BITMAP_8_BY_13             (&glutBitmap8By13)
#  define GLUT_BITMAP_TIMES_ROMAN_10      (&glutBitmapTimesRoman10)
#  define GLUT_BITMAP_TIMES_ROMAN_24      (&glutBitmapTimesRoman24)
#  define GLUT_BITMAP_HELVETICA_10        (&glutBitmapHelvetica10)
#  define GLUT_BITMAP_HELVETICA_12        (&glutBitmapHelvetica12)
#  define GLUT_BITMAP_HELVETICA_18        (&glutBitmapHelvetica18)

FL_EXPORT void glutBitmapCharacter(void *font, int character);
FL_EXPORT int glutBitmapHeight(void *font);
FL_EXPORT int glutBitmapLength(void *font, const unsigned char *string);
FL_EXPORT void glutBitmapString(void *font, const unsigned char *string);
FL_EXPORT int glutBitmapWidth(void *font, int character);

FL_EXPORT int glutExtensionSupported(char *name);

/* GLUT stroked font sub-API */
struct Fl_Glut_StrokeVertex {
  GLfloat X, Y;
};

struct Fl_Glut_StrokeStrip {
  int Number;
  const Fl_Glut_StrokeVertex* Vertices;
};

struct Fl_Glut_StrokeChar {
  GLfloat Right;
  int Number;
  const Fl_Glut_StrokeStrip* Strips;
};

struct Fl_Glut_StrokeFont {
  char* Name;        // The source font name
  int Quantity;        // Number of chars in font
  GLfloat Height;      // Height of the characters
  const Fl_Glut_StrokeChar** Characters;// The characters mapping
};
extern FL_EXPORT Fl_Glut_StrokeFont glutStrokeRoman;
extern FL_EXPORT Fl_Glut_StrokeFont glutStrokeMonoRoman;
#  define GLUT_STROKE_ROMAN    (&glutStrokeRoman)
#  define GLUT_STROKE_MONO_ROMAN  (&glutStrokeMonoRoman)

FL_EXPORT void glutStrokeCharacter(void *font, int character);
FL_EXPORT GLfloat glutStrokeHeight(void *font);
FL_EXPORT int glutStrokeLength(void *font, const unsigned char *string);
FL_EXPORT void glutStrokeString(void *font, const unsigned char *string);
FL_EXPORT int glutStrokeWidth(void *font, int character);

/* GLUT pre-built models sub-API */
FL_EXPORT void glutWireSphere(GLdouble radius, GLint slices, GLint stacks);
FL_EXPORT void glutSolidSphere(GLdouble radius, GLint slices, GLint stacks);
FL_EXPORT void glutWireCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
FL_EXPORT void glutSolidCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
FL_EXPORT void glutWireCube(GLdouble size);
FL_EXPORT void glutSolidCube(GLdouble size);
FL_EXPORT void glutWireTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
FL_EXPORT void glutSolidTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
FL_EXPORT void glutWireDodecahedron();
FL_EXPORT void glutSolidDodecahedron();
FL_EXPORT void glutWireTeapot(GLdouble size);
FL_EXPORT void glutSolidTeapot(GLdouble size);
FL_EXPORT void glutWireOctahedron();
FL_EXPORT void glutSolidOctahedron();
FL_EXPORT void glutWireTetrahedron();
FL_EXPORT void glutSolidTetrahedron();
FL_EXPORT void glutWireIcosahedron();
FL_EXPORT void glutSolidIcosahedron();

#endif // !Fl_glut_H

//
// End of "Id".
//
